MODEL RELEASED. Nurse instructing a young man (an asthma patient) in the use of a Becotide (R) inhaler. The Becotide inhaler contains the corticosteroid drug beclomethasone dipropionate. The action of corticosteroids in asthma is not fully understood, but it is believed they give relief by reducing inflammation in the bronchial mucous membrane, causing less oedema (fluid retention) and hypersecretion of mucous. Becotide aerosol inhalers deliver a dose of 50 or 100 micrograms (depending on type) per puff. A typical daily dosage using the lower strength inhaler would be 200 micrograms (4 puffs) twice daily.